# BlueOptics SFP2121BU3MK InfiniBand fibre optic cable 3 m LC Yellow

**URL:** https://aio.lv/en/product--blueoptics-sfp2121bu3mk--4469502
**Data updated:** 2025-12-29 17:23 (EET)
**Category:** Fiber Optic Cables
**Manufacturer:** BlueOptics
**Manufacturer code:** SFP2121BU3MK
**EAN:** 4063232619385
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 17.49 €
**Prices and availability valid until:** 2026-07-18 23:59
**Price without VAT (21%):** 14.45 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--blueoptics-sfp2121bu3mk--4469502

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 20.07.2026 | free |
| Pickup points | 23.07.2026 | 1.99 EUR |
| Courier delivery to door | 23.07.2026 | 4.99 EUR |

## Summary description

The BlueOptics SFP2121BU3MK is a 3 m InfiniBand fibre optic cable featuring LC connectors. It utilizes G.657.A1 fibre optic type, ensuring high performance and reliability for data transmission. Ideal for connecting devices in data centers or high-speed networks.

## Long description

BlueOptics SFP2121BU3MK is a 3 meter simplex fiber optic patch cord with LC/PC to LC/PC connectors, single-mode G.657.A1 (E9/125 µm) fiber and a yellow LSZH jacket. It is designed for high-quality transmission of 1310 nm and 1550 nm signals and is suitable for interconnecting patch panels, optical transceivers and other devices in data centers and high-speed networks.
Advantages
The cable uses G.657.A1 single-mode fiber with low attenuation (0.4 dB/km) and high return loss; connector endface polishing can be supplied as UPC or 8° APC to further optimise return loss. The LSZH jacket reduces smoke and eliminates halogen in case of fire. Connectors use zirconia ceramic ferrules and branded components to ensure long life and consistent mechanical performance.
Suitable for
 Interconnecting optical transceivers
 Patching between patch panels and switches
 InfiniBand links and high-speed network connections
 Data centre fibre management and short-range backbone links
Key specifications
 Length: 3 m
 Connector type: LC/PC to LC/PC (simplex)
 Fibre type: Single-mode G.657.A1 (E9/125 µm)
 Wavelengths: 1310 nm / 1550 nm
 Attenuation: 0.4 dB/km
 Jacket: LSZH (yellow)
 MPN: SFP2121BU3MK
 EAN: 4063232619385
How to use
Inspect connector endfaces before mating and clean if necessary. Align the LC connector with the device port and insert until it clicks; avoid excessive bending of the fiber and maintain the minimum bend radius recommended for G.657.A1 fibres. For removal, depress the latch and pull straight out. Use appropriate strain relief and cable routing in patch panels or racks to prevent damage.
Usage recommendations
Keep connectors capped when not in use, use approved fibre cleaning tools for endface maintenance, and request custom lengths if a non-standard run is required. A measurement protocol with insertion loss and return loss values is included with each cable.

## Specifications

| Feature | Value |
|---|---|
| Weight | 0.02 kg |
| Package weight | 20 g |
| Cable length | 3 m |
| Product colour | Yellow |
| Connector 1 | LC |
| Connector 2 | LC |
| Connector 1 gender | Male |
| Connector 2 gender | Male |
| Quantity per pack | 1 pc(s) |
| Fibre optic type | G.657.A1 |

## FAQ

### How much does the InfiniBand fibre optic cable BlueOptics SFP2121BU3MK cost, and is it available for purchase?

The price is 17.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 7 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 20.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All BlueOptics products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized BlueOptics service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/4469502/64297871_large.webp